See more synonyms for outage on Thesaurus.com
  1. an interruption or failure in the supply of power, especially electricity.
  2. the period during which power is lost: a two-hour outage on the East Coast.
  3. a stoppage in the functioning of a machine or mechanism due to a failure in the supply of power or electricity.
  4. the quantity of goods lost or lacking from a shipment.Compare innage(def 1).
  5. Aeronautics. the amount of fuel used during a flight.Compare innage(def 2).

Origin of outage

An Americanism dating back to 1900–05; out + -age
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for outage


  1. a quantity of goods missing or lost after storage or shipment
  2. a period of power failure, machine stoppage, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for outage

"period or condition in which electrical power is disconnected," 1903, American English; formed from out on model of shortage.

Online Etymology Dictionary, © 2010 Douglas Harper